package day.day03;

public class IfDemo {
    public static void main(String[] args) {
         //满500打8折,不满打9折
        double price =300.0;//消费金额
        if (price >= 500.0) {
            price *= 0.8 ;
        }else{
            price *= 0.9 ;
        }
        System.out.println("最终结算金额是: " + price);

        //判断成绩是否合法    0到100之内为合法成绩
        double score =555;
        if (score >= 0 && score<=100) {
            System.out.println(score+"是合法成绩");
         }else{
            System.out.println(score+"是不合法成绩");
        }
    }
}
